@article{MZ_1961__76_169945,
     author = {Walter Vogel},
     title = {Lineare {Programme} und allgemeine {Vertretersysteme.}},
     journal = {Mathematische Zeitschrift},
     pages = {103--115},
     publisher = {mathdoc},
     volume = {76},
     year = {1961},
     zbl = {0100.15104},
     url = {http://geodesic.mathdoc.fr/item/MZ_1961__76_169945/}
}